J. Anim Sci.
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
QUICK SEARCH:   [advanced]


     

This Article
Right arrow Full Text
Right arrow Full Text (PDF)
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow reprints & permissions
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Fernández, A.
Right arrow Articles by Silió, L.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Fernández, A.
Right arrow Articles by Silió, L.
J. Anim. Sci. 2002. 80:2267-2275
© 2002 American Society of Animal Science

Inbreeding effects on the parameters of the growth function in three strains of Iberian pigs1

A. Fernández, J. Rodrigáñez, M. A. Toro, M. C. Rodríguez and L. Silió2

Departamento de Mejora Genética Animal, INIA, Ctra La Coruña km 7, 28040 Madrid, Spain

2 Correspondence:
phone: 34-91-3476757; fax: 34-91-3572293; E-mail:
silio{at}inia.es.

The growth performance of inbred pigs coming from full-sib matings was compared to that of contemporary animals coming from the same sires mated to control dams. The animals belong to three strains of Iberian pigs with different histories of previous inbreeding. The data consisted of 1,615 weight records between 50 and 250 d of age from 229 pigs. The statistical model assumed the two parameters that describe the linear growth function (a = intercept, b = slope) as different traits (weight at 120 d and daily gain) and the analysis was carried out in a Bayesian framework via Gibbs sampling. The means of the posterior distribution of heritabilities, common litter environmental coefficients, and genetic correlation were 0.328 (h2a), 0.332 (h2b), 0.084 (c2a), 0.060 (c2b) and 0.973 ({rho}G). Inbreeding depression, expressed as the performance decrease relative to the mean, per 10% increase of the inbreeding coefficient, was -3.18, -2.31 and -5.37% for weight at 120 d (a), and -3.16, -2.08 and -6.49% for daily gain (b) in each of the three strains. The results indicate that the inbreeding effects are dependent on the level of previous inbreeding, the more previous inbreeding, the less inbreeding depression.

Key Words: Bayesian Theory • Coancestry • Growth • Inbreeding Depression • Pigs




This article has been cited by other articles:


Home page
 J ANIM SCIHome page
M.-H. Li, I. Stranden, and J. Kantanen
Genetic diversity and pedigree analysis of the Finnsheep breed
J Anim Sci, May 1, 2009; 87(5): 1598 - 1605.
[Abstract] [Full Text] [PDF]

Home page
 J ANIM SCIHome page
A. I. Fernandez, E. Alves, A. Fernandez, E. de Pedro, M. A. Lopez-Garcia, C. Ovilo, M. C. Rodriguez, and L. Silio
Mitochondrial genome polymorphisms associated with longissimus muscle composition in Iberian pigs
J Anim Sci, June 1, 2008; 86(6): 1283 - 1290.
[Abstract] [Full Text] [PDF]


HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
Copyright © 2002 by the American Society of Animal Science.